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[79.34.220.97]) by smtp.gmail.com with ESMTPSA id a12sm4004619edx.91.2021.03.19.06.28.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 Mar 2021 06:28:08 -0700 (PDT) Date: Fri, 19 Mar 2021 14:28:06 +0100 From: Ansuel Smith To: Thara Gopinath Cc: Andy Gross , Bjorn Andersson , Amit Kucheria , Zhang Rui , Daniel Lezcano , Rob Herring , linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v11 1/9] drivers: thermal: tsens: Add VER_0 tsens version Message-ID: References: <20210319005228.1250-1-ansuelsmth@gmail.com> <20210319005228.1250-2-ansuelsmth@gmail.com> <7c38ea02-d957-6f63-ccce-1c35dd5d04de@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <7c38ea02-d957-6f63-ccce-1c35dd5d04de@linaro.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Mar 19, 2021 at 09:11:38AM -0400, Thara Gopinath wrote: > > > On 3/18/21 8:52 PM, Ansuel Smith wrote: > > VER_0 is used to describe device based on tsens version before v0.1. > > These device are devices based on msm8960 for example apq8064 or > > ipq806x. > > Hi Ansuel, > > There are still checkpatch check warnings in this patch. Please run > checkpatch.pl --strict and fix them. Once that is done, you can add > > Reviewed-by: Thara Gopinath > > Warm Regards > Thara > Hi, thanks a lot for the review. The only warning I have is a line ending with ( that i think I can't fix or I will go over the max char for line. Do you have something more? > > > > Signed-off-by: Ansuel Smith > > --- > > drivers/thermal/qcom/tsens.c | 141 ++++++++++++++++++++++++++++------- > > drivers/thermal/qcom/tsens.h | 4 +- > > 2 files changed, 116 insertions(+), 29 deletions(-) > > > > diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c > > index d8ce3a687b80..277d9b17e949 100644 > > --- a/drivers/thermal/qcom/tsens.c > > +++ b/drivers/thermal/qcom/tsens.c > > @@ -12,6 +12,7 @@ > > #include > > #include > > #include > > +#include > > #include > > #include > > #include > > @@ -515,6 +516,15 @@ static irqreturn_t tsens_irq_thread(int irq, void *data) > > dev_dbg(priv->dev, "[%u] %s: no violation: %d\n", > > hw_id, __func__, temp); > > } > > + > > + if (tsens_version(priv) < VER_0_1) { > > + /* Constraint: There is only 1 interrupt control register for all > > + * 11 temperature sensor. So monitoring more than 1 sensor based > > + * on interrupts will yield inconsistent result. To overcome this > > + * issue we will monitor only sensor 0 which is the master sensor. > > + */ > > + break; > > + } > > } > > return IRQ_HANDLED; > > @@ -530,6 +540,13 @@ static int tsens_set_trips(void *_sensor, int low, int high) > > int high_val, low_val, cl_high, cl_low; > > u32 hw_id = s->hw_id; > > + if (tsens_version(priv) < VER_0_1) { > > + /* Pre v0.1 IP had a single register for each type of interrupt > > + * and thresholds > > + */ > > + hw_id = 0; > > + } > > + > > dev_dbg(dev, "[%u] %s: proposed thresholds: (%d:%d)\n", > > hw_id, __func__, low, high); > > @@ -584,18 +601,21 @@ int get_temp_tsens_valid(const struct tsens_sensor *s, int *temp) > > u32 valid; > > int ret; > > - ret = regmap_field_read(priv->rf[valid_idx], &valid); > > - if (ret) > > - return ret; > > - while (!valid) { > > - /* Valid bit is 0 for 6 AHB clock cycles. > > - * At 19.2MHz, 1 AHB clock is ~60ns. > > - * We should enter this loop very, very rarely. > > - */ > > - ndelay(400); > > + /* VER_0 doesn't have VALID bit */ > > + if (tsens_version(priv) >= VER_0_1) { > > ret = regmap_field_read(priv->rf[valid_idx], &valid); > > if (ret) > > return ret; > > + while (!valid) { > > + /* Valid bit is 0 for 6 AHB clock cycles. > > + * At 19.2MHz, 1 AHB clock is ~60ns. > > + * We should enter this loop very, very rarely. > > + */ > > + ndelay(400); > > + ret = regmap_field_read(priv->rf[valid_idx], &valid); > > + if (ret) > > + return ret; > > + } > > } > > /* Valid bit is set, OK to read the temperature */ > > @@ -608,15 +628,29 @@ int get_temp_common(const struct tsens_sensor *s, int *temp) > > { > > struct tsens_priv *priv = s->priv; > > int hw_id = s->hw_id; > > - int last_temp = 0, ret; > > + int last_temp = 0, ret, trdy; > > + unsigned long timeout; > > - ret = regmap_field_read(priv->rf[LAST_TEMP_0 + hw_id], &last_temp); > > - if (ret) > > - return ret; > > + timeout = jiffies + usecs_to_jiffies(TIMEOUT_US); > > + do { > > + if (tsens_version(priv) == VER_0) { > > + ret = regmap_field_read(priv->rf[TRDY], &trdy); > > + if (ret) > > + return ret; > > + if (!trdy) > > + continue; > > + } > > - *temp = code_to_degc(last_temp, s) * 1000; > > + ret = regmap_field_read(priv->rf[LAST_TEMP_0 + hw_id], &last_temp); > > + if (ret) > > + return ret; > > - return 0; > > + *temp = code_to_degc(last_temp, s) * 1000; > > + > > + return 0; > > + } while (time_before(jiffies, timeout)); > > + > > + return -ETIMEDOUT; > > } > > #ifdef CONFIG_DEBUG_FS > > @@ -738,19 +772,31 @@ int __init init_common(struct tsens_priv *priv) > > priv->tm_offset = 0x1000; > > } > > - res = platform_get_resource(op, IORESOURCE_MEM, 0); > > - tm_base = devm_ioremap_resource(dev, res); > > - if (IS_ERR(tm_base)) { > > - ret = PTR_ERR(tm_base); > > - goto err_put_device; > > + if (tsens_version(priv) >= VER_0_1) { > > + res = platform_get_resource(op, IORESOURCE_MEM, 0); > > + tm_base = devm_ioremap_resource(dev, res); > > + if (IS_ERR(tm_base)) { > > + ret = PTR_ERR(tm_base); > > + goto err_put_device; > > + } > > + > > + priv->tm_map = devm_regmap_init_mmio(dev, tm_base, &tsens_config); > > + } else { /* VER_0 share the same gcc regs using a syscon */ > > + struct device *parent = priv->dev->parent; > > + > > + if (parent) > > + priv->tm_map = syscon_node_to_regmap(parent->of_node); > > } > > - priv->tm_map = devm_regmap_init_mmio(dev, tm_base, &tsens_config); > > - if (IS_ERR(priv->tm_map)) { > > + if (IS_ERR_OR_NULL(priv->tm_map)) { > > ret = PTR_ERR(priv->tm_map); > > goto err_put_device; > > } > > + /* VER_0 have only tm_map */ > > + if (!priv->srot_map) > > + priv->srot_map = priv->tm_map; > > + > > if (tsens_version(priv) > VER_0_1) { > > for (i = VER_MAJOR; i <= VER_STEP; i++) { > > priv->rf[i] = devm_regmap_field_alloc(dev, priv->srot_map, > > @@ -769,6 +815,10 @@ int __init init_common(struct tsens_priv *priv) > > ret = PTR_ERR(priv->rf[TSENS_EN]); > > goto err_put_device; > > } > > + /* in VER_0 TSENS need to be explicitly enabled */ > > + if (tsens_version(priv) == VER_0) > > + regmap_field_write(priv->rf[TSENS_EN], 1); > > + > > ret = regmap_field_read(priv->rf[TSENS_EN], &enabled); > > if (ret) > > goto err_put_device; > > @@ -791,6 +841,20 @@ int __init init_common(struct tsens_priv *priv) > > goto err_put_device; > > } > > + priv->rf[TSENS_SW_RST] = devm_regmap_field_alloc( > > + dev, priv->srot_map, priv->fields[TSENS_SW_RST]); > > + if (IS_ERR(priv->rf[TSENS_SW_RST])) { > > + ret = PTR_ERR(priv->rf[TSENS_SW_RST]); > > + goto err_put_device; > > + } > > + > > + priv->rf[TRDY] = > > + devm_regmap_field_alloc(dev, priv->tm_map, priv->fields[TRDY]); > > + if (IS_ERR(priv->rf[TRDY])) { > > + ret = PTR_ERR(priv->rf[TRDY]); > > + goto err_put_device; > > + } > > + > > /* This loop might need changes if enum regfield_ids is reordered */ > > for (j = LAST_TEMP_0; j <= UP_THRESH_15; j += 16) { > > for (i = 0; i < priv->feat->max_sensors; i++) { > > @@ -806,7 +870,7 @@ int __init init_common(struct tsens_priv *priv) > > } > > } > > - if (priv->feat->crit_int) { > > + if (priv->feat->crit_int || tsens_version(priv) < VER_0_1) { > > /* Loop might need changes if enum regfield_ids is reordered */ > > for (j = CRITICAL_STATUS_0; j <= CRIT_THRESH_15; j += 16) { > > for (i = 0; i < priv->feat->max_sensors; i++) { > > @@ -844,7 +908,11 @@ int __init init_common(struct tsens_priv *priv) > > } > > spin_lock_init(&priv->ul_lock); > > - tsens_enable_irq(priv); > > + > > + /* VER_0 interrupt doesn't need to be enabled */ > > + if (tsens_version(priv) >= VER_0_1) > > + tsens_enable_irq(priv); > > + > > tsens_debug_init(op); > > err_put_device: > > @@ -943,10 +1011,14 @@ static int tsens_register_irq(struct tsens_priv *priv, char *irqname, > > if (irq == -ENXIO) > > ret = 0; > > } else { > > - ret = devm_request_threaded_irq(&pdev->dev, irq, > > - NULL, thread_fn, > > - IRQF_ONESHOT, > > - dev_name(&pdev->dev), priv); > > + /* VER_0 interrupt is TRIGGER_RISING, VER_0_1 and up is ONESHOT */ > > + ret = devm_request_threaded_irq( > > + &pdev->dev, irq, > > + tsens_version(priv) == VER_0 ? thread_fn : NULL, > > + tsens_version(priv) == VER_0 ? NULL : thread_fn, > > + tsens_version(priv) == VER_0 ? IRQF_TRIGGER_RISING : > > + IRQF_ONESHOT, > > + dev_name(&pdev->dev), priv); > > if (ret) > > dev_err(&pdev->dev, "%s: failed to get irq\n", > > __func__); > > @@ -975,6 +1047,19 @@ static int tsens_register(struct tsens_priv *priv) > > priv->ops->enable(priv, i); > > } > > + /* VER_0 require to set MIN and MAX THRESH > > + * These 2 regs are set using the: > > + * - CRIT_THRESH_0 for MAX THRESH hardcoded to 120?C > > + * - CRIT_THRESH_1 for MIN THRESH hardcoded to 0?C > > + */ > > + if (tsens_version(priv) < VER_0_1) { > > + regmap_field_write(priv->rf[CRIT_THRESH_0], > > + tsens_mC_to_hw(priv->sensor, 120000)); > > + > > + regmap_field_write(priv->rf[CRIT_THRESH_1], > > + tsens_mC_to_hw(priv->sensor, 0)); > > + } > > + > > ret = tsens_register_irq(priv, "uplow", tsens_irq_thread); > > if (ret < 0) > > return ret; > > diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h > > index f40b625f897e..8e6c1fd3ccf5 100644 > > --- a/drivers/thermal/qcom/tsens.h > > +++ b/drivers/thermal/qcom/tsens.h > > @@ -13,6 +13,7 @@ > > #define CAL_DEGC_PT2 120 > > #define SLOPE_FACTOR 1000 > > #define SLOPE_DEFAULT 3200 > > +#define TIMEOUT_US 100 > > #define THRESHOLD_MAX_ADC_CODE 0x3ff > > #define THRESHOLD_MIN_ADC_CODE 0x0 > > @@ -25,7 +26,8 @@ struct tsens_priv; > > /* IP version numbers in ascending order */ > > enum tsens_ver { > > - VER_0_1 = 0, > > + VER_0 = 0, > > + VER_0_1, > > VER_1_X, > > VER_2_X, > > }; > >